Daily Sunspot Evaluation
Observation Sheet Friday, 7 April 1967
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 6
- Number of spots (f)
- 40
- Relative number (R)
- 100
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 11 | 11E | 124 ⚠ | |||
| 2 | B – 4 | 23 | 37E | 107 | |||
| 3 | J – 4 | 11 | 33E | 112 | |||
| 4 | A – 1 | 20 | 55E | 90 | |||
| 5 | C – 5 | -25 | 14E | 131 | |||
| 6 | D – 24 | -19 | 11W | 156 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.